try this patch -- if you have the animatedbg.gif in your wallpapers folder it should turn everything dark -- you can change this file to change the color if you like say to black
Attached Files messaging dark bg 2.0.1.patch (409 Bytes, 2 views) Email Attachment

Not sure I know how to change the color. Do I change 'color:#0A0A0A' to something else?